Marantz SR4200 Humming noise?

[crisp82]

I have a Marantz SR4200 and have noticed a low level hum coming from the amp. It is also accompanied by a slight vibration of the unit. My first thoughts are a problem with the transformer, or maybe an earth problem. I have checked the power lead from the amp, and the amp only has 2 prongs for power transfer.

Am I right in thinking that this is missing the earth?

Is there anthing I can do to stop this hum and vibration?

Thanks,

Crisp

 

[Mylo]

The unit does not use an earth as it is double insulated. Transformers do buzz and as long as you cannot hear the noise from your listening position i wouldnt worry to be honest. If I put my ear against my SR4200 I can hear a low level humming/buzzing noise, this is normal.

 

[crisp82]

Cool, thanks mate.